Best Sources of Omega-3 Fatty Acids

Omega-3 fatty acids are essential fats that support heart, brain, and eye health, and they play a role in reducing inflammation throughout the body. Because your body can't produce them on its own, they need to come from food or supplements.

The three types of omega-3s

ALA (alpha-linolenic acid) comes mainly from plant sources and is converted by the body into small amounts of EPA and DHA, though this conversion is inefficient. EPA and DHA come primarily from marine sources and are the forms most directly linked to heart and brain health benefits in research.

Best animal-based sources

Fatty fish are the richest sources of EPA and DHA: salmon, mackerel, sardines, herring, and anchovies all provide substantial amounts per serving. Most nutrition guidelines recommend two servings of fatty fish per week for the general population.

Best plant-based sources

Flaxseed, chia seeds, walnuts, hemp seeds, and canola oil are good sources of ALA. Since the body converts ALA to EPA/DHA inefficiently, people eating little or no fish sometimes consider an algae-based omega-3 supplement, which provides EPA and DHA directly from a plant source.

How much you actually need

There's no single universal target, but many health organizations suggest at least 250-500mg combined EPA and DHA per day for general health, with higher amounts sometimes recommended for specific heart health goals under medical guidance.

Should you supplement?

If you eat fatty fish a couple of times a week, a supplement usually isn't necessary. For vegetarians, vegans, or people who rarely eat fish, an algae-based omega-3 supplement is a reasonable way to close the gap.